The Fundamental Planes of Black Hole Activity for Radio-Loud and Radio-Quiet Quasars

Abstract

We examine the fundamental plane of black hole activity for correlations with redshift and radio loudness in both radio-loud and radio-quiet quasar populations. Sources are compiled from archival data of both radio-loud and radio-quiet quasars over redshifts $0.1<z<5.0$ to produce a sample of 353 sources with known X-ray, radio, and black hole mass measurements. A fundamental plane of accretion activity is fit to a sample of radio-loud and radio-quiet quasars, and we find a dichotomy between radio-loud and radio-quiet sources. The set of best-fit equations that best describe the two samples are $\log L_R=(1.12\pm 0.06)\log L_X-(0.20\pm 0.07)\log M-(5.64\pm 2.99)$ for our radio-loud sample and $\log L_R=(0.48\pm 0.06)\log L_X+(0.50\pm 0.08)\log M+(15.26\pm 2.66)$ for our radio-quiet sample. Our results suggest that the average radio-quiet quasar emission is consistent with advection dominated accretion, while a combination of jet and disc emission dominates in radio-loud quasars. We additionally examine redshift trends amongst the radio-loud and radio-quiet samples, and we observe a redshift dependence for the fundamental plane of radio-loud quasars. Lastly, we utilize the fundamental plane as a black hole mass estimation method and determine it useful in studying systems where standard spectral modeling techniques are not viable.

arXiv commentAccepted to MNRAS, 9 pages, 5 figures, 3 tables, 1 supplemental table included. Corrected data of 4 sources in the supplemental table. Conclusions remain unchanged

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